Fujitsu MHN2150AT, MHN2100AT, MHN2300AT, MHN2200AT manual Servo frame format

Theory of Device Operation

4.7.3 Servo frame format

As the servo information, the IDD uses the two-phase servo generated from the gray code and servo A to D. This servo information is used for positioning operation of radius direction and position detection of circumstance direction.

The servo frame consists of 6 blocks; write/read recovery, servo mark, gray code, servo A to D, and PAD. Figure 4.9 shows the servo frame format.

Figure 4.9 Servo frame format

4-20 C141-E120-02EN